Hello,
I just ported the ManageVE Resource Agent for OpenVZ to work with LXC
System Containers. The result is ManageLXC, you can find it enclosed.
There are 2 parameters required:
- ctname: name of the container
- lxcconf: absolute path to container configuration
The resource agent tries to make use of the lxc-ctrlaltdel command
supplied by Tobias Gruetzmacher to cleanly shutdown a container. The
script should reside in /usr/bin.
http://www.mail-archive.com/lxc-devel@lists.sourceforge.net/msg00881.html
If lxc-ctrlaltdel is missing or fails to execute, the RA uses lxc-stop
in addition.
The RA does not support migration at the moment, since the LXC
Checkpoint/Restore feature is not in mainline so far.
Regards,
Christoph
#!/bin/bash
#
# ManageLXC OCF RA. Manages LXC Containers (CT)
#
# (c) 2011 Christoph Mitasch
# based on MangeVE RA 1.00.4
# 2006-2010 Matthias Dahl, Florian Haas
# and Linux-HA contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of version 2 of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
#
# Further, this software is distributed without any warranty that it is
# free of the rightful claim of any third person regarding infringement
# or the like. Any license provided herein, whether implied or
# otherwise, applies only to this software file. Patent licenses, if
# any, provided herein do not apply to combinations of this program with
# other software, or any other product whatsoever.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
#
#
# This OCF compliant resource agent manages LXC CT and thus requires
# a proper LXC system including lxc userspace tools.
#
# rev. 1.00.0
#
# Changelog
#
# 24/May/11 1.00.0 first version, tested with lxc 0.7.4
#
###
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
###
# required utilities
LXCPATH=/usr/bin
#
# usage()
#
usage()
{
cat <<-EOF
usage: $0 {start|stop|status|monitor|validate-all|usage|meta-data}
EOF
}
#
# meta_data()
#
meta_data()
{
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="ManageLXC">
<version>1.00.0</version>
<longdesc lang="en">
This OCF compliant resource agent manages LXC System Containers and thus
requires
an Linux kernel with LXC support and the LXC userspace tools.
</longdesc>
<shortdesc lang="en">Manages LXC Containers</shortdesc>
<parameters>
<parameter name="lxcconf" unique="0" required="1">
<longdesc lang="en">
LXC configuration file with full path
</longdesc>
<shortdesc lang="en">LXC configuration file</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="ctname" unique="0" required="1">
<longdesc lang="en">
LXC container name
</longdesc>
<shortdesc lang="en">LXC container name</shortdesc>
<content type="string" default="" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="75" />
<action name="stop" timeout="75" />
<action name="status" depth="0" timeout="10" interval="10" />
<action name="monitor" depth="0" timeout="10" interval="10" />
<action name="validate-all" timeout="5" />
<action name="meta-data" timeout="5" />
</actions>
</resource-agent>
END
}
#
# start_ct()
#
# Starts a CT, or simply logs a message if the CT is already running.
#
start_ct()
{
if status_ct; then
ocf_log info "CT $CTNAME already running."
return $OCF_SUCCESS
fi
ocf_run $LXCPATH/lxc-start -n $CTNAME -f $LXCCONF -d || exit $OCF_ERR_GENERIC
return $OCF_SUCCESS
}
#
# stop_ct()
#
stop_ct()
{
status_ct
if [ $? -eq $OCF_NOT_RUNNING ]; then
ocf_log info "CT $CTNAME already stopped."
return $OCF_SUCCESS
fi
if [ -x $LXCPATH/lxc-ctrlaltdel ]
then
ocf_run $LXCPATH/lxc-ctrlaltdel -n $CTNAME -w 30
fi
ocf_run $LXCPATH/lxc-stop -n $CTNAME -q || exit $OCF_ERR_GENERIC
return $OCF_SUCCESS
}
#
# status_ct()
#
# This function relies on the output of lxc-info command
#
status_ct()
{
declare -i retcode
ctstatus=`$LXCPATH/lxc-info -n $CTNAME | grep -q RUNNING 2>/dev/null`
running=$?
`$LXCPATH/lxc-info -n $CTNAME >/dev/null 2>&1`
retcode=$?
if [[ $retcode != 0 ]]; then
ocf_log err "lxc-info -n $CTNAME returned: $retcode"
exit $OCF_ERR_GENERIC
fi
case "$running" in
0)
return $OCF_SUCCESS
;;
*)
return $OCF_NOT_RUNNING
;;
esac
}
#
# validate_all_ct()
#
validate_all_ct()
{
declare -i retcode
`status_ct`
retcode=$?
if [[ $retcode != $OCF_SUCCESS && $retcode != $OCF_NOT_RUNNING ]]; then
return $retcode
fi
return $OCF_SUCCESS
}
if [[ $# != 1 ]]; then
usage
exit $OCF_ERR_ARGS
fi
case "$1" in
meta-data)
meta_data
exit $OCF_SUCCESS
;;
usage)
usage
exit $OCF_SUCCESS
;;
*)
;;
esac
#
# check relevant environment variables for sanity and security
#
# empty string?
`test -z "$OCF_RESKEY_ctname"`
`test -z "$OCF_RESKEY_lxcconf"`
declare CTNAME=$OCF_RESKEY_ctname
declare LXCCONF=$OCF_RESKEY_lxcconf
#
# check that all relevant utilities are available
#
check_binary $LXCPATH/lxc-start
check_binary $LXCPATH/lxc-stop
check_binary $LXCPATH/lxc-info
#
# finally... let's see what we are ordered to do :-)
#
case "$1" in
start)
start_ct
;;
stop)
stop_ct
;;
status|monitor)
status_ct
;;
validate-all)
validate_all_ct
;;
*)
usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
exit $?
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